CHATTANOOGA
GROUP INC.
Intelect® Legend Series
Service Manual
P.N. 78343 Rev. A
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CHATTANOOGA |
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GROUP INC. |
I NEED TO KNOW . . . |
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Go to page |
Warranty Information .............................. |
3 |
How the unit works.................................. |
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What might be wrong with my unit ...... |
25 |
What the error messages mean ........... |
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Special Key Combinations.................... |
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How to calibrate the unit ....................... |
38 |
How to open the unit ............................... |
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How the boards interconnect ............... |
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Where the connectors are..................... |
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What the signals are.............................. |
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Part numbers.......................................... |
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How to get service help........................... |
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How to close the unit............................... |
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Technical Specifications....................... |
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First look on this page to quickly find where to go in the manual for more information !
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Intelect® Legend Series Service Manual |
CHATTANOOGA
GROUP INC.
Intelect® Legend Two Year Limited Warranty
The Chattanooga Group Inc. (“Company”) warrants that the Intelect® Legend Ultrasound or Stim (“Product”) excluding accessories is free of defects in material and workmanship.
This warranty shall remain in effect for two (2) years from the date of the original consumer purchase of this and extends to any owner of the product during the warranty period. Accessories that are included as standard with the product (as listed in the user’s manual) are warranted for 90 days. Ultrasound applicators 2cm2, 5cm2 or 10cm2 are warranted for one (1) year. If this product fails to function during the two year warranty period because of a defect in material or workmanship, the company or the selling dealer will replace or repair this product without charge within a period of 30 days from the date on which the defective product is returned to the company or dealer. The company or the dealer will ship the replacement or the repaired product to the owner.
All repairs must be performed by a service center authorized by the Chattanooga Group, Inc. Any modifications or repairs performed by unauthorized centers or groups will void this warranty. To participate in warranty coverage, the product’s warranty registration card (included with the product) must be filled out and returned to the Chattanooga Group, Inc. by the original owner within 10 business days of purchase.
This warranty does not cover:
Replacement parts or labor furnished by anyone other than the Company, the dealer or an approved Company service agent.
Defects or damage caused by labor furnished by someone other than Company, the dealer or an approved Company service agent.
Any malfunction or failure in the product while it is in the possession of the owner during the warranty period if the malfunction or failure is not caused by a defect in material or workmanship or if the malfunction or failure is caused by unreasonable use, applications in which the product was not intended or the failure to provide reasonable and necessary maintenance.
The Company shall Not be Liable for Incidental or Consequential Damages.
To Obtain Service:
From Company or the selling dealer under this warranty, the owner must do or abide by the following:
•A written claim must be made within the warranty period to Company or the selling dealer.
•If the claim is made to the Company, the written claim should be sent to: Chattanooga Group INC.
Australian Warehouse Dingley Victoria 3172 Phone: (03) 9558 3825 Fax: (03) 9558 2491
•The product must be returned to Company or the selling dealer by the owner.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
The Company does not authorize any person or representative to create for it any other obligation or liability in connection with the sale of the Product. Any representation or agreement not contained in the warranty shall be void and of no effect.
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Intelect® Legend Series Service Manual |
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CHATTANOOGA
GROUP INC.
Start Here
About This Manual
This manual is intended to cover the Intelect® Legend Ultrasound and Stim units and their accessories only.
The purpose of this service manual is to give a qualified technician enough information to troubleshoot problems to the board level. Because of the complexity and construction of these boards it is not recommended that problems be traced to the component level. Some problems may be due to a misunderstanding of how the machine operates. Thus it is important to read the operators manual first to gain familiarity with how the machine operates under normal circumstances.
Since this service manual is intended to assist in isolating the problem to a circuit board, we will not cover the functions performed on each board in detail.
This manual presents a brief theory of operation of each board and accessory in the unit. It contains a troubleshooting guide for common problems. This guide is not meant to cover every possible problem that a service technician might encounter, but rather to give examples of what may be seen. The manual also contains diagrams of the connector layout of each board, a system diagram of how the unit is wired, and a list of signals carried on each wire. Also included are calibration procedures for the unit, parts lists and information on obtaining service.
Important !
The specifications and information put forth in this manual were in effect at the time of publication. However, owing to Chattanooga Group’s policy of continuous improvement, changes to these may be made at any time without obligation on the part of Chattanooga Group, Inc.
Specifically, as there are improvements made to the circuit boards in these units the connector names may change. However, the location and function of the connector will not likely change. Use reasonable judgment and contact Chattanooga Group when in doubt.
Chattanooga Group, Inc., obviously cannot be responsible for work performed on their units by individuals or other companies not approved or authorized to perform service on Chattanooga Group equipment. Always try to resolve any problems through your dealer or Chattanooga Group’s customer service department FIRST.
Please read and understand the following precautions before using or servicing a unit.
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Intelect® Legend Series Service Manual |
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CHATTANOOGA
GROUP INC.
PRECAUTIONARY INSTRUCTIONS
As with any electrical device, use extreme caution while working inside the devices. Some of the circuits produce high voltages which may be accessible while servicing the unit. Be especially mindful of jewelry and tools that may accidentally come in contact with components inside the unit.
Most of the electronic components incorporated in the unit are electrostaticly sensitive. Always wear a static grounding strap and work on a static dissipative surface.
CAUTION: Read, understand and practice the precautionary and operating instructions contained in the unit’s manual and in this service manual. Know the limitations and hazards associated with using any ultrasound device. Observe the precautionary and operational decals placed on the unit.
CAUTION: Do not operate the Intelect® Legend Unit when connected to any unit other than Chattanooga Group, Inc., devices. Do not operate the unit in an environment of short-wave diathermy use.
WARNING: Federal Law restricts this device to sale by, or on the order of, a physician or licensed practitioner. This device should be used only under the continued supervision of a physician or licensed practitioner.
CAUTION: The ultrasound generator should be routinely checked before each use to determine that all controls function normally; especially that the intensity control does properly adjust the intensity of the ultrasonic power output in a stable manner. Also, determine that the treatment time control does actually terminate ultrasonic power output when the timer reaches zero.
CAUTION: Use of controls or adjustments or performance of procedures other than those specified in the unit’s manual or in this service manual may result in hazardous exposure to ultrasonic energy.
CAUTION: DO NOT use sharp objects such as a pencil point or ball point pen to operate the buttons on the control panel as damage may result.
WARNING: Explosion hazard if used in the presence of flammable anesthetics. The warning symbol for this hazard is prominently displayed on the cabinet.
WARNING: For continued protection against fire hazard, replace fuses only with ones of the same type and rating.
WARNING: Make certain that the unit is electrically grounded by connecting only to a grounded electrical service receptacle conforming to the applicable national and local electrical codes.
WARNING: This device should be kept out of the reach of children.
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Intelect® Legend Series Service Manual |
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CHATTANOOGA
GROUP INC.
Theory of Operation
Overview
To better understand the details in the following paragraphs, a quick look at the operation of the entire system is helpful.
The unit is powered by a desktop switching power supply which accepts 100-240VAC and delivers a regulated 12-16VDC. Each board within the unit has its own local regulation as required by the particular board functions.
The user interface consists of the membrane switch panel on the top of the case and the LCD parameter screen for the Stim unit or LED displays for the Ultrasound unit. Choices presented on the LCD screen are selected via the membrane switches for the Stim unit while selections are made directly from the membrane switches and reflected in the LED displays on the Ultrasound unit. After a treatment is started on the Stim unit, the LCD screen returns to a display showing the status of the outputs. The LED displays constantly reflect the status of the Ultrasound unit. Alarms and feedback of keypresses are provided by a beeper located inside the case.
Connection for the ultrasound applicator and for electrode lead wires are made to panels on the side of the unit. The rear of the unit has the power supply input connector, the fuse and the fan.
Accessories supplied with all Ultrasound units include at least one applicator and ultrasound gel. Stim units have electrode leads and electrodes.
The Control Boards
•The Ultrasound Control Board
The signals controlling the Ultrasound Generator Board are carried through a 40 conductor cable from JP5 on the Control Board to J1 on the US Generator Board. Refer to the signal list. The signals include address and data lines, handshake lines and power supply controls.
Connector JP6 is for the membrane switches. JP1 is the power supply connector and supplies power from the desktop power supply.
JP2 is the output power connector for the Ultrasound Generator Board. JP4 supplies power to the fan and JP3 is for the beeper.
•The Stim Control Board
The signals controlling the Stim Board leave JP7 on the Control Board and go through a 40 conductor cable to JP1 on the Stim Board. See the
Signal List for details. Signals include address and data lines, handshake lines, and power supply control signals.
Connector JP4 is for the LCD screen. It is mounted directly behind the board and against the front panel. JP9 carries power for the electroluminescent backlighting.
Connector JP10 is for the membrane switches. JP1 is the power supply connector and supplies power from the desktop power supply.
JP2 is the output power connector for the Stim Board.
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Intelect® Legend Series Service Manual |
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CHATTANOOGA
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JP3 supplies power to the fan and JP6 is for the beeper.
The Stim Board
The Stim Board’s function is to generate various output waveforms under the direction of the Control Board. Due to the variety of waveforms commonly used in electrotherapy, there are different waveform generators on the board, all controlled by a common Digital Signal Processor (DSP).
•The Sine Wave Generators
There are two of these on each Stim Board, one for channel 1 and the other for channel 2. Each is identical except for their connections to the output jacks. Under control of the DSP, Programmable Array Logic (PAL) devices generate a driving signal which is fed to an amplifier. The output amplitude of the amplifier is determined by a programmable power supply, also controlled by the DSP. The resulting output is filtered and routed by relays to the appropriate connector on the board.
These same generators are used to develop the VMS, or Biphasic output, the Premod output, the Interferential output and the Russian output.
•The Hi-Volt Generator
The Hi-Volt output is only available from channel 2 of the unit. Under control of the DSP, timing information is generated by a PAL. This is used to control the charging and discharging of a transformer. The discharges are routed through relays to obtain the proper polarity and connect them to the proper output connector on the board.
JP2 on the Stim Board determines whether the board operates as channels 1&2 or 3&4 on a CPS 400. This jumper must be set for channels 1&2 for the unit to operate properly. See the board drawing in the Signal Lists section for jumper configuration.
The Ultrasound Board
The Ultrasound Board uses a Phase Locked Loop (PLL) that is set by a PAL based on control by the Control Board to generate a stable high frequency signal. This signal is used to drive an amplifier whose output is filtered and drives the transducer. The amplitude of the amplifier output is determined by its programmable power supply. Other circuitry monitors the temperature of the transducer as well as voltage and current of the drive to the transducer.
The Ultrasound Board is controlled by signals from connector JP5 of the Control Board that are carried through a 40 conductor cable to J1 on the Ultrasound Board. The signals consist of address and data lines as well as handshake lines. There are also signals for turning off the power supplies on the Ultrasound Board when it is not generating output.
The power for the Ultrasound Board is through J2. Connector J3 is the output of the Ultrasound Board which ultimately drives the transducer in the applicator.
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Intelect® Legend Series Service Manual |
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CHATTANOOGA
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The Ultrasound Applicator
The Ultrasound Applicator comes in several models, depending on the surface area of the transducer and the shape of the face of the transducer. The circuitry within all of them is the same.
Connection to the Applicator is through a triaxial cable. The center conductor carries the drive to the transducer while the inner shield is the return. The outer shield is used to monitor the transducer temperature using a thermistor inside the Applicator.
A small circuit board inside the Applicator holds components for transducer temperature sensing and the memory device. The memory device stores the frequency and power information for the transducer. The memory device communicates via the two shields of the cable.
The Membrane Switch Panel
The membrane switch panel connects to JP6 on the Ultrasound Control Board and JP10 on the Stim Control Board. The switches are electrically arranged such that one side of all the switches have a common return. The other side of the switches are brought out individually to the connector. The switch activations are buffered and latched on the Control Boards.
The LCD Parameter Screen
The LCD parameter screen mounts between the Control Board and the top of the case. The interface between the LCD and the Stim Control Board’s
JP4 is a bi-directional 8-bit bus along with handshake signals. There is a separate connection via JP9 for supplying power to the electroluminescent backlight of the LCD. There is a module mounted on the Control Board which generates the necessary voltage for this.
The LED Interface
The LED displays mount on the solder side of the Ultrasound Control
Board so as to show through the overlay on the case. They are soldered directly to the board and therefore are not replaceable.
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Intelect® Legend Series Service Manual |
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CHATTANOOGA
GROUP INC.
General Service Procedures
Preventing damage to the case
The plastic case of the Intelect units is quite durable, as are the membrane switch overlays. To remove the screws and open the case for servicing it will be necessary to place the unit upside down. Be sure the work surface is covered so that the unit isn’t scratched. Also be careful with tools that may scratch the case or overlays.
Location of screws
There are 6 screws that hold the case together and all of them are accessible from the bottom of the unit. These screws are distinguished from others on the bottom in that they are all recessed into the plastic case. Remove all 6 screws.
Opening the Case
Flip the unit back over and carefully lift the top of the case off the bottom. The top of the case can be opened from the left and put on the right side of the bottom without disconnecting the cables. If you do need to remove any cables, NOTE THE ORIENTATION of these cables BEFORE unplugging them because pin 1 is not marked on all the PC Boards. Mark the cable or connector and the board before unplugging with a permanent marker, tape or other means if you need to. You will also need to make note of which small 2- wire connector is for the fan and which is for the beeper. If these become swapped when assembling the unit, the beeper will sound continuously whenever the power is on.
Special Tools
Almost any operation can be performed without any special tools. If you need to replace the EPROMs or PALs on any of the boards, you MUST use a special tool to remove the parts. Attempting to remove these IC’s in any other way can damage the socket and make the entire circuit board unusable. The preferred tool is Burndy QILEXT-1, sold by Newark Electronics as type 290N, P/N 95F3004.
Closing the case
Re-assemble the unit taking care to properly install any cables you may have disconnected. When lowering the top down onto the bottom, be careful not to capture any wires in the edge of the case. If you are having difficulty it may be necessary to align one side of the case and then force the other side to align. Also notice that the metal plates on either side must align with plastic structures inside the case. After all this work look around the edge of the case one last time to be sure everything looks OK. Now the back panel may have fallen into the cabinet while aligning the top and bottom - don’t panic. Carefully lift the rear edge of the top just enough to allow you to pull the panel back into its slot in the top and bottom of the case.
Hold the unit together and flip it over (once again be sure the table is covered so that the case isn’t scratched) and put the 6 screws back in place.
Don’t overtighten the screws, tighten them just until the edges of the case seat together.
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Intelect® Legend Series Service Manual |
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CHATTANOOGA
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Signal Lists
Intelect® Ultrasound Control Board
Below is a simple drawing showing the approximate locations of the connectors and the position of pin 1 on each connector.
JP1
Legend US Control
PIN 1JP2 |
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PIN 1JP3 |
PIN 1 |
PIN 1 |
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PIN 1 |
JP5 |
JP6 |
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JP4 |
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PIN 1 |
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Below are tables showing the signals for each connector on the Control Board. The columns are arranged as pin number, signal description, type of signal and any other notable information about the signal.
JP1 |
US Control Board |
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Signal Name |
Type |
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1 |
Battery In |
Power |
Unused |
2 |
Battery In |
Power |
Unused |
3 |
Power Supply In |
Power |
+8 to +18 VDC |
4 |
Power Supply In |
Power |
+8 to +18 VDC |
5 |
Ground |
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6 |
Ground |
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JP2 |
US Control Board |
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Pin # |
Signal Name |
Type |
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1 |
Power Out |
Power |
+8 to +18 VDC |
2 |
Power Out |
Power |
+8 to +18 VDC |
3 |
Ground |
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4 |
Ground |
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GROUP INC. |
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JP3 |
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US Control Board |
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Pin # |
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Signal Name |
Type |
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1 |
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Unregulated Power |
Power |
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+8 to +18VDC, |
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Current Limited |
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2 |
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Buzzer On |
Output |
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Open Collector, Active |
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Low |
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JP4 |
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US Control Board |
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Pin # |
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Signal Name |
Type |
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Unregulated DC |
Power |
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8-18VDC |
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2 |
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Fan On |
Output |
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Open Collector, Active |
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Low |
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JP5 |
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US Control Board |
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Pin # |
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Signal Name |
Type |
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1 |
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Ground |
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2 |
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US Data Line 0 |
Bi-Directional |
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Digital |
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3 |
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Ground |
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4 |
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US Data Line 1 |
Bi-Directional |
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Digital |
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5 |
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Ground |
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6 |
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US Data Line 2 |
Bi-Directional |
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Digital |
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7 |
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Ground |
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8 |
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US Data Line 3 |
Bi-Directional |
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Digital |
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9 |
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Ground |
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10 |
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US Data Line 4 |
Bi-Directional |
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Digital |
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Ground |
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12 |
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US Data Line 5 |
Bi-Directional |
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Digital |
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Ground |
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14 |
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US Data Line 6 |
Bi-Directional |
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Digital |
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Ground |
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16 |
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US Data Line 7 |
Bi-Directional |
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Digital |
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17 |
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Ground |
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18 |
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No Connection |
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19 |
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Ground |
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20 |
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US Address Line 0 |
Output |
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Digital |
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21 |
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Ground |
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22 |
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US Address Line 1 |
Output |
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Digital |
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23 |
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Ground |
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24 |
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No Connection |
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25 |
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Ground |
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26 |
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No Connection |
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27 |
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Ground |
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28 |
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No Connection |
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29 |
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Ground |
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30 |
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US Strobe |
Output |
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Digital Active Low |
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31 |
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Ground |
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32 |
US Board Enable |
Output |
Digital Active Low |
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33 |
Ground |
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34 |
US Read/Write |
Output |
Digital Active Low |
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35 |
Ground |
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36 |
No Connection |
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37 |
Ground |
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38 |
US Power Down 1 |
Output |
Digital |
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39 |
Ground |
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40 |
US Power Down 2 |
Output |
Digital |
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JP6 |
US Control Board |
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Pin # |
Signal Name |
Type |
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1 |
Ground |
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2 |
Switch 0 |
Input |
Digital Active Low |
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3 |
Switch 1 |
Input |
Digital Active Low |
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4 |
Switch 2 |
Input |
Digital Active Low |
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5 |
Switch 3 |
Input |
Digital Active Low |
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6 |
Switch 4 |
Input |
Digital Active Low |
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7 |
Switch 5 |
Input |
Digital Active Low |
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8 |
Switch 6 |
Input |
Digital Active Low |
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9 |
Switch 7 |
Input |
Digital Active Low |
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10 |
Switch 8 |
Input |
Digital Active Low |
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11 |
Switch 9 |
Input |
Digital Active Low |
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12 |
Switch 10 |
Input |
Digital Active Low |
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Intelect® Legend Series Service Manual |
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CHATTANOOGA
GROUP INC.
Intelect® Legend Stim Control Board
Below is a simple drawing showing the approximate locations of the connectors and the position of pin 1 on each connector.
Below are tables showing the signals for each connector on the Control Board. The columns are arranged as pin number, signal description, type of signal and any other notable information about the signal.
JP1 |
Stim Control |
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Board |
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Pin # |
Signal Name |
Type |
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1 |
Battery In |
Power |
Unused |
2 |
Battery In |
Power |
Unused |
3 |
Power Supply In |
Power |
+8 to +18 VDC |
4 |
Power Supply In |
Power |
+8 to +18 VDC |
5 |
Ground |
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6 |
Ground |
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JP2 |
Stim Control |
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Board |
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Pin # |
Signal Name |
Type |
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1 |
Power Out |
Power |
+8 to +18 VDC |
2 |
Power Out |
Power |
+8 to +18 VDC |
3 |
Ground |
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4 |
Ground |
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